/* =========================================================
  家轩的博客 - 统一样式（主页/子页共用）
  目标：不改变现有视觉，只做去重 + 三页一致 + 深浅主题同步
========================================================= */

/* ===== 浅色（默认） ===== */
:root{
  --bg: #f5f7fb;
  --bg-2: #eef2f7;
  --blob-a: rgba(59,109,140,.10);
  --blob-b: rgba(179,143,122,.10);

  --surface: rgba(255,255,255,.72);
  --surface-solid: #ffffff;
  --line: rgba(15, 23, 42, .10);

  --text: #0f172a;
  --muted: rgba(15,23,42,.62);
  --link: rgba(15,23,42,.78);

  --primary: #3b6d8c;
  --accent:  #b38f7a;

  --nav-a: rgba(245,247,251,.25);
  --nav-b: rgba(245,247,251,0);
  --nav-sc-a: rgba(245,247,251,.92);
  --nav-sc-b: rgba(245,247,251,.70);

  --btn-bg: rgba(255,255,255,.60);
  --btn-bg-hover: rgba(255,255,255,.78);
  --chip-bg: rgba(255,255,255,.55);

  --soft-1: rgba(15,23,42,.06);
  --soft-2: rgba(15,23,42,.02);
  --shine: rgba(255,255,255,.70);

  --card-grad-a: rgba(59,109,140,.16);
  --card-grad-b: rgba(179,143,122,.14);

  --radius: 18px;
  --shadow: 0 12px 30px rgba(15, 23, 42, .08);
  --shadow-2: 0 18px 48px rgba(15, 23, 42, .12);

  --nav-h: 64px;
  --max: 1100px;

  --ease: cubic-bezier(.22,1,.36,1);

  color-scheme: light;
}

/* ===== 深色（跟随系统） ===== */
@media (prefers-color-scheme: dark){
  :root{
    --bg: #0b1225;
    --bg-2: #0f172a;
    --blob-a: rgba(122,166,194,.18);
    --blob-b: rgba(201,163,143,.14);

    --surface: rgba(15,23,42,.58);
    --surface-solid: #0f172a;
    --line: rgba(148,163,184,.18);

    --text: rgba(226,232,240,.96);
    --muted: rgba(226,232,240,.66);
    --link: rgba(226,232,240,.78);

    --primary: #7aa6c2;
    --accent:  #c9a38f;

    --nav-a: rgba(11,18,37,.35);
    --nav-b: rgba(11,18,37,0);
    --nav-sc-a: rgba(11,18,37,.88);
    --nav-sc-b: rgba(11,18,37,.72);

    --btn-bg: rgba(255,255,255,.08);
    --btn-bg-hover: rgba(255,255,255,.12);
    --chip-bg: rgba(255,255,255,.08);

    --soft-1: rgba(255,255,255,.06);
    --soft-2: rgba(255,255,255,.03);
    --shine: rgba(255,255,255,.18);

    --card-grad-a: rgba(122,166,194,.18);
    --card-grad-b: rgba(201,163,143,.12);

    --shadow: 0 14px 44px rgba(0,0,0,.35);
    --shadow-2: 0 22px 60px rgba(0,0,0,.45);

    color-scheme: dark;
  }
}

/* ===== 手动强制主题：data-theme 覆盖系统 ===== */
:root[data-theme="light"]{
  color-scheme: light;
}
:root[data-theme="dark"]{
  --bg: #0b1225;
  --bg-2: #0f172a;
  --blob-a: rgba(122,166,194,.18);
  --blob-b: rgba(201,163,143,.14);

  --surface: rgba(15,23,42,.58);
  --surface-solid: #0f172a;
  --line: rgba(148,163,184,.18);

  --text: rgba(226,232,240,.96);
  --muted: rgba(226,232,240,.66);
  --link: rgba(226,232,240,.78);

  --primary: #7aa6c2;
  --accent:  #c9a38f;

  --nav-a: rgba(11,18,37,.35);
  --nav-b: rgba(11,18,37,0);
  --nav-sc-a: rgba(11,18,37,.88);
  --nav-sc-b: rgba(11,18,37,.72);

  --btn-bg: rgba(255,255,255,.08);
  --btn-bg-hover: rgba(255,255,255,.12);
  --chip-bg: rgba(255,255,255,.08);

  --soft-1: rgba(255,255,255,.06);
  --soft-2: rgba(255,255,255,.03);
  --shine: rgba(255,255,255,.18);

  --card-grad-a: rgba(122,166,194,.18);
  --card-grad-b: rgba(201,163,143,.12);

  --shadow: 0 14px 44px rgba(0,0,0,.35);
  --shadow-2: 0 22px 60px rgba(0,0,0,.45);

  color-scheme: dark;
}

/* ===== 基础 ===== */
html, body{
  height: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 14px);
}

body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI",
    Roboto, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 20% -10%, var(--blob-a), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, var(--blob-b), transparent 52%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
}

:focus-visible{
  outline: 3px solid rgba(59,109,140,.35);
  outline-offset: 2px;
  border-radius: 12px;
}

/* ===== 页面入场 ===== */
.page{
  min-height: 100%;
  opacity: 0;
  transform: translateY(8px);
  animation: pageIn .65s var(--ease) forwards;
}
@keyframes pageIn{ to { opacity: 1; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce){
  .page{ animation: none; opacity: 1; transform: none; }
  *{ transition: none !important; animation: none !important; }
}

/* ===== 导航栏 ===== */
.nav{
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 50;
  display: flex;
  align-items: center;

  background: linear-gradient(180deg, var(--nav-a), var(--nav-b));
  border-bottom: 1px solid transparent;

  transition: background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
}
.nav.scrolled{
  background: linear-gradient(180deg, var(--nav-sc-a), var(--nav-sc-b));
  border-bottom-color: var(--line);
  box-shadow: 0 10px 24px rgba(0,0,0,.10);
}

.nav-inner{
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  position: relative;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.logo-img{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.7);
  background: rgba(255,255,255,.35);
  flex: 0 0 auto;
}

.brand strong{
  font-weight: 800;
  letter-spacing: .2px;
  white-space: nowrap;
}
.brand span{
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.nav-actions{
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== 菜单/链接/按钮 ===== */
.menu{
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

a.link{
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease), background .2s var(--ease);
}
a.link:hover{
  color: var(--text);
  border-bottom-color: rgba(59,109,140,.45);
  transform: translateY(-1px);
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--btn-bg);
  color: var(--text);
  text-decoration: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
  user-select: none;
}
.btn:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  background: var(--btn-bg-hover);
}
.btn.primary{
  background: rgba(59,109,140,.14);
  border-color: rgba(59,109,140,.28);
}
.btn.primary:hover{
  box-shadow: 0 16px 40px rgba(59,109,140,.18);
}

.icon-btn{
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--btn-bg);
  color: var(--link);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease);
  padding: 0;
}
.icon-btn:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  background: var(--btn-bg-hover);
  color: var(--text);
}
.icon{
  width: 18px;
  height: 18px;
  fill: currentColor;
}
.sr-only{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.icon-sun{ display: none; }
.icon-moon{ display: inline; }
html.is-dark .icon-sun{ display: inline; }
html.is-dark .icon-moon{ display: none; }

.menu-toggle{ display: none; }

/* ===== 主体通用 ===== */
main{
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: calc(var(--nav-h) + 26px) 0 40px;
}
section{ scroll-margin-top: calc(var(--nav-h) + 14px); }

/* ===== 卡片 ===== */
.card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.card::before{
  content:"";
  position:absolute; inset: 0;
  background:
    radial-gradient(600px 220px at 20% 0%, var(--card-grad-a), transparent 55%),
    radial-gradient(520px 220px at 85% 10%, var(--card-grad-b), transparent 50%);
  opacity: .55;
  pointer-events: none;
}
.card > *{ position: relative; }

/* ===== 首页：简介区 ===== */
.hero{
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 18px;
  align-items: stretch;
}
@media (max-width: 860px){
  .hero{ grid-template-columns: 1fr; }
}

.intro{
  padding: 18px 18px 16px;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  align-items: center;
}
@media (max-width: 520px){
  .intro{ grid-template-columns: 86px 1fr; }
}

/* shimmer 动画（头像骨架屏用） */
@keyframes shimmer{
  0% { transform: translateX(-40%) rotate(12deg); }
  60%{ transform: translateX(40%) rotate(12deg); }
  100%{ transform: translateX(40%) rotate(12deg); }
}

.avatar{
  width: 104px; height: 104px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--soft-1), var(--soft-2));
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.18);
  flex: 0 0 auto;
}
.avatar::after{
  content:"";
  position:absolute; inset:-60%;
  background: linear-gradient(90deg, transparent, var(--shine), transparent);
  transform: rotate(12deg);
  animation: shimmer 2.6s var(--ease) infinite;
  opacity: .9;
}
.avatar img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity .35s var(--ease);
}
.avatar .fallback{
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: .6px;
  color: color-mix(in srgb, var(--text) 60%, transparent);
  background: transparent;
  pointer-events: none;
}
.avatar.loaded::after{ opacity: 0; }
.avatar.loaded img{ opacity: 1; }
.avatar.loaded .fallback{ opacity: 0; }

/* 手机端：头像自适应缩放（保持左右布局） */
@media (max-width: 480px){
  .intro{
    grid-template-columns: minmax(64px, 88px) 1fr;
    column-gap: 12px;
  }
  .avatar{
    width: clamp(64px, 18vw, 88px);
    height: clamp(64px, 18vw, 88px);
    border-radius: 18px;
  }
}

.intro h1{
  margin: 0 0 8px;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: .2px;
}
.intro p{
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14.5px;
}

.meta{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.chip{
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--chip-bg);
  color: color-mix(in srgb, var(--text) 78%, transparent);
}

.sidebox{
  padding: 18px;
  display: grid;
  gap: 12px;
}
.sidebox h2{
  margin: 0;
  font-size: 14px;
  color: color-mix(in srgb, var(--text) 70%, transparent);
  letter-spacing: .25px;
  font-weight: 700;
  text-transform: uppercase;
}
.sidebox .tip{
  line-height: 1.75;
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

.stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 520px){
  .stats{ grid-template-columns: repeat(2, 1fr); }
}
.stat{
  background: var(--chip-bg);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
}
.stat b{
  display:block;
  font-size: 18px;
  letter-spacing: .2px;
  margin-bottom: 4px;
}
.stat span{
  color: var(--muted);
  font-size: 12px;
}

/* ===== 首页：文章列表 ===== */
.section{ margin-top: 22px; }

.section-head{
  display: flex;
  align-items: flex-start; /* 你当前页面的最终效果就是它 */
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.section-head h3{
  margin: 0 0 10px;
  font-size: 16px;
  letter-spacing: .2px;
  line-height: 1.25;
}
.section-head p{
  margin: 0;
  padding-top: 2px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  opacity: .92;
}
@media (max-width: 640px){
  .section-head h3{ margin-bottom: 12px; }
  .section-head p{ line-height: 1.8; }
}

.grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
@media (max-width: 860px){
  .grid{ grid-template-columns: 1fr; }
}

.post{
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 10px 24px rgba(0,0,0,.10);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
  position: relative;
  overflow: hidden;
}
.post::before{
  content:"";
  position:absolute; inset: 0;
  background: radial-gradient(520px 220px at 20% 0%, var(--card-grad-a), transparent 55%);
  opacity: .35;
  pointer-events:none;
}
.post:hover{
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-2);
  border-color: rgba(59,109,140,.22);
}

.post h4{
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: .2px;
}
.post .desc{
  margin: 0 0 12px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14px;
}
.post .row{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
  color: color-mix(in srgb, var(--text) 60%, transparent);
  font-size: 12px;
  flex-wrap: wrap;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(59,109,140,.22);
  background: rgba(59,109,140,.10);
  color: color-mix(in srgb, var(--text) 76%, transparent);
  white-space: nowrap;
}
.dot{
  width: 6px; height: 6px; border-radius: 999px;
  background: rgba(179,143,122,.95);
  box-shadow: 0 0 0 4px rgba(179,143,122,.14);
}

/* ===== 子页：文章布局 ===== */
.layout{
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 16px;
  align-items: start;
}
@media (max-width: 980px){
  .layout{ grid-template-columns: 1fr; }
}

.article{ padding: 18px 18px 10px; }
.title{
  margin: 0 0 6px;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: .2px;
}
.sub{
  margin: 0 0 14px;
  color: var(--muted);
  display:flex; gap: 10px; flex-wrap: wrap;
  font-size: 13px;
  line-height: 1.8;
}
.hr{
  height: 1px;
  background: var(--line);
  margin: 12px 0 16px;
}

.prose{
  font-size: 15px;
  line-height: 1.8;
  color: color-mix(in srgb, var(--text) 90%, transparent);
}
.prose p{ margin: 0 0 14px; }
.prose h2{
  margin: 22px 0 10px;
  font-size: 16px;
  letter-spacing: .2px;
}
.prose h2::before{
  content:"";
  display:inline-block;
  width: 10px; height: 10px;
  border-radius: 999px;
  background: rgba(59,109,140,.22);
  border: 1px solid rgba(59,109,140,.30);
  margin-right: 10px;
  vertical-align: middle;
}
:root[data-theme="dark"] .prose h2::before{
  background: rgba(201,163,143,.22);
  border-color: rgba(201,163,143,.30);
}
.prose ul{ margin: 0 0 14px 18px; }
.prose li{ margin: 6px 0; }
.prose code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  background: rgba(255,255,255,.08);
  padding: 2px 6px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.10);
}
:root:not([data-theme="dark"]) .prose code{
  background: rgba(15,23,42,.06);
  border-color: rgba(15,23,42,.08);
}

.actions{
  display:flex; gap: 10px; flex-wrap: wrap;
  padding: 0 18px 18px;
}

.toc{
  padding: 16px;
  position: sticky;
  top: calc(var(--nav-h) + 14px);
}
.toc h3{
  margin: 0 0 10px;
  font-size: 13px;
  color: color-mix(in srgb, var(--text) 66%, transparent);
  letter-spacing: .25px;
  text-transform: uppercase;
}
.toc a{
  display:block;
  padding: 8px 10px;
  border-radius: 12px;
  text-decoration:none;
  color: color-mix(in srgb, var(--text) 76%, transparent);
  border: 1px solid transparent;
  transition: background .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
  font-size: 13px;
  line-height: 1.4;
}
.toc a:hover{
  background: rgba(255,255,255,.08);
  border-color: var(--line);
  transform: translateY(-1px);
}
.toc a.active{
  background: rgba(59,109,140,.12);
  border-color: rgba(59,109,140,.22);
}
:root[data-theme="dark"] .toc a.active{
  background: rgba(201,163,143,.12);
  border-color: rgba(201,163,143,.22);
}

/* 返回顶部按钮 */
.top{
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 60;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}
.top.show{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ===== 页脚 ===== */
footer{
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 40px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.foot{
  display:flex;
  gap: 10px;
  align-items:center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.foot small{ font-size: 12px; }

/* ===== 移动端：菜单下拉 ===== */
@media (max-width: 720px){
  .nav-inner{ width: calc(100% - 24px); }

  .menu{
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;

    display: grid;
    gap: 10px;

    padding: 12px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: saturate(140%) blur(12px);
    -webkit-backdrop-filter: saturate(140%) blur(12px);

    opacity: 0;
    pointer-events: none;
    transform: translateY(-6px) scale(.98);
    transform-origin: top right;
    transition: opacity .18s var(--ease), transform .18s var(--ease);
  }
  .nav.open .menu{
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .menu a.link{
    display: block;
    padding: 10px 12px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--surface-solid) 40%, transparent);
    transform: none;
  }
  .menu a.link:hover{
    border-bottom-color: transparent;
    transform: none;
  }
  .menu .btn.primary{ width: 100%; }

  .menu-toggle{ display: inline-flex; }
}